摘要
利用ANSYS CFX分软件及湍流模型,通过改变液环泵喷射器的结构参数,模拟其内部的三维流动探讨了结构参数对喷射器内部流场及性能的影响;重点分析了引射压力、喉嘴距和面积比对喷射器性能的影响;得到了喷射器性能(引射气量、喷射系数等)随喉嘴距、面积比的变化规律;模拟结果表明:几何参数的改变极大的影响着波系结构;在给定的设计工况下,存在一个最佳的面积比(约为10.15)及一个最优的喉嘴距(20mm)对应于最大的喷射系数,为喷射器的优化设计提供了依据。
By varying the structural parameter of ejector of liquid ring pump and simulating internal 3-D flow,the impact of structural parameter on internal flow field and performance of ejector is investigated with software package CFX and turbulence model,in which the impact of the injecting pressure,the throat-nozzle distance and the ratio of secondary area on performance of ejector is emphasized.And the varying regularity is obtained.That is the performance（air flow injected and ejecting coefficient and so on） of the ejector varies with the change of the throat-nozzle distance and the ratio of area.The result shows that the vary of geometric parameters impacts the wave structure significantly;There are a optimum area ratio and an ideal throat-nozzle distance available under given condition corresponding to max.ejecting coefficient,which provides reference for optimal design of ejector.
出处
《机械设计与制造》
北大核心
2012年第5期111-112,共2页
Machinery Design & Manufacture
关键词
喷射器
CFX
喉嘴距
面积比
喷射系数
Ejector
CFX
Throat-nozzle distance
Area ratio
Ajecting coefficient
